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The effect of listening to high-resolution digital audio on cognitive function

Research Project

Project/Area Number 17K18702
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Research Field Psychology and related fields
Research InstitutionOsaka University

Principal Investigator

Nittono Hiroshi  大阪大学, 人間科学研究科, 教授 (20304371)

Project Period (FY) 2017-06-30 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2018: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2017: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Keywords実験系心理学 / 心理生理学 / 聴覚
Outline of Final Research Achievements

High-resolution audio is a generic term for systems that can render beyond standard quality audio such as CD or DVD. This study dealt with how high-resolution audio affects the listener's experience. A series of experiments using the electroencephalogram (EEG) and evoked brain potentials revealed the following three findings. First, listening to audio materials that contained inaudible high-frequency components induced a larger oscillatory power on the EEG than listening to similar materials from which the high-frequency components were removed by digital filtering. Second, filtering out high-frequency components caused a temporal smearing of the sound (i.e., blurring instantaneous sound onsets), but the difference was not registered in the auditory cortex when the sampling rate was not changed. Third, when the sound was converted into a lower sampling rate, the resulting temporal distortion may have affected auditory neural processing from the inner ear level.

Academic Significance and Societal Importance of the Research Achievements

ハイレゾ音源は情報量が多く,可聴域を超える周波数帯域まで再現できる点がメリットだと言われることがある。しかし,今回の研究から,ハイレゾ音源の効果は,高周波音成分によって生じるのではなく,音の時間的歪みを少なくできるために生じることが示唆された。デジタルオーディオであっても,データを物理的な音に変換して再生するアナログ経路がきわめて重要であり,その部分を改善することが聴取体験の向上につながるといえる。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (10 results)

All 2020 2019 2018 2017

All Journal Article (1 results) (of which Open Access: 1 results) Presentation (8 results) Funded Workshop (1 results)

  • [Journal Article] 心理生理学のすすめ-ハイレゾから「かわいい」までー2020

    • Author(s)
      入戸野 宏
    • Journal Title

      生産と技術

      Volume: 72 Pages: 94-97

    • NAID

      40022119183

    • Related Report
      2019 Annual Research Report
    • Open Access
  • [Presentation] デジタル音源のダウンサンプリングに伴う音の歪みの知覚と聴性脳幹反応2020

    • Author(s)
      大湾 麻衣・入戸野 宏
    • Organizer
      第38回日本生理心理学会大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] What is the role of high-frequency sound components in high-resolution audio? A mismatch negativity study.2019

    • Author(s)
      Nittono, H.
    • Organizer
      29th Annual Meeting of the Australasian Society for Psychophysiology (ASP2019)
    • Related Report
      2019 Annual Research Report
  • [Presentation] ハイレゾオーディオが脳波に影響する仕組み-ミスマッチ陰性電位からの示唆-2019

    • Author(s)
      入戸野 宏
    • Organizer
      第49回日本臨床神経生理学会学術大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] ハイレゾ音源に含まれる高周波成分は感覚記憶を形成しない2019

    • Author(s)
      入戸野 宏
    • Organizer
      第37回日本生理心理学会大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 自然環境音の再生サンプリング周波数が音質の知覚と心理生理状態に及ぼす影響2019

    • Author(s)
      大湾麻衣・入戸野 宏
    • Organizer
      第37回日本生理心理学会大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] ハイレゾ音源は聞き分けられるか?―ミスマッチ陰性電位による検討―2018

    • Author(s)
      入戸野 宏
    • Organizer
      第36回日本生理心理学会大会
    • Related Report
      2018 Research-status Report
  • [Presentation] 自然環境音のサンプリング周波数が人間の心理・生理状態に及ぼす影響2018

    • Author(s)
      大湾麻衣・入戸野 宏
    • Organizer
      日本認知心理学会第16回大会
    • Related Report
      2018 Research-status Report
  • [Presentation] ハイレゾ音源をヘッドホンで聴取することが心理生理反応に与える効果2017

    • Author(s)
      入戸野 宏・栗林 龍馬
    • Organizer
      第35回日本生理心理学会大会(江戸川大学)
    • Related Report
      2017 Research-status Report
  • [Funded Workshop] 29th Annual Meeting of the Australasian Society for Psychophysiology (ASP2019)2019

    • Related Report
      2019 Annual Research Report

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Published: 2017-07-21   Modified: 2021-02-19  

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